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FL2440移植u-boot2011.09

时间:2014-05-09 11:20:13      阅读:455      评论:0      收藏:0      [点我收藏+]

u-boot version:2011.09-rc1

/home/lucas/u-boot-2011.09-rc1

OS:debian 7.1

cross-compilation chain:arm-linux-4.3.2

致谢:部分内容参考http://my.csdn.net/crazyman2010的博文,感谢分享。

第一步:u-boot初步编译

【目的】验证开发平台可以正确编译u-boot,初步建立文件目录。

1.建立目标板相关文件

(1)建立板级文件夹

board/samsung下建立fl440目录,并将相似的板级文件夹smdk2410下全部文件拷贝过去。重命名fl2440下的smdk2410.c为fl2440.c;修改Makefile中的目标COBJS中的smdk2410.ofl2440.o

(2)建立芯片级文件夹

直接使用cpu/arm920t的芯片文件夹即可,无需修改。

2.初步编译u-boot生成.bin文件

(1)建立配置文件

拷贝includ/configs/smdk2410.h,重命名为fl2440.h

(2)建立编译规则

在根目录的Makefile中找到ARM架构smdk2410编译规则

smdk2410_config : unconfig
  @$(MKCONFIG) $(@:_config=) arm arm920t smdk2410 samsung s3c24x0

仿写fl2440编译规则

fl2440+config : unconfig
  @$(MKCONFIG) $(@:_config=) arm arm920t fl2440 samsung s3c24x0

另外需要指定交叉编译:

CROSS_COMPILE ?= arm-linux-

(3)编译u-boot

make clean

make fl2440_config

make

【注】根目录下生成u-boot.bin和u-boot(即u-boot.axf,添加axf缀即可)。若编译工具为3.3.2等不支持软浮点型,需要把arm920t/config.mk中的#-msoft-float注释掉。

【特别说明】DNW下载的程序是从指定位置运行,而u-boot默认地址为0。FL2440的DRAM地址空间是0x30000000-0x34000000,共64M。所以需要修改

(1)修改DNW配置,设置下载地址为0x32000000;

(2)修改include/configs/fl2440.h:#define CONFIG_SYS_TEXT_BASE    0x32000000

第二步:修改相关配置,在SDRAM中调试

【注】因为实在SDRAM中调试,需要跳过cpu的初始化,所以应在include/configs/fl2440.h中添加#define  CONFIG_SKIP_LOWLEVEL_INIT 1

1.修改include/configs/fl2440.h

删除:

#define CONFIG_S3C2410          /*specifically a SAMSUNG S3C2410 SoC */

#define CONFIG_SMDK2410         /* on aSAMSUNG SMDK2410 Board */
添加:
#define CONFIG_S3C2440 
【注】将NAND配置先注释起来,不然会有很多错误:/*#define CONFIG_CMD_NAND*/
更改内存范围:
#defineCONFIG_SYS_MEMTEST_END         0x33F00000
修改为:
#defineCONFIG_SYS_MEMTEST_END         0x34000000
2.修改时钟

(1)修改arch/arm/cpu/arm920t/start.S

在line163处增加屏蔽中断代码:

# if defined(CONFIG_S3C2440)
        ldr     r1,=0x7fff /*S3C2440使用15位,所以是111 1111 1111 1111*/
        ldr     r0,=INTSUBMSK
        str     r1, [r0]
# endif

删除:

ldr     r0, =CLKDIVN
mov     r1, #3
str     r1, [r0]

添加:

# if defined(CONFIG_S3C2440)
        ldr     r0,=CLKDIVN
        mov     r1, #5
        str     r1, [r0]
#endif

(2)修改board/samsung/fl2440/fl2440.c

删除:

#define FCLK_SPEED 1
#ifFCLK_SPEED==0              /* Fout = 203MHz, Fin = 12MHz for Audio */
#define M_MDIV  0xC3
#define M_PDIV  0x4
#define M_SDIV  0x1
#elifFCLK_SPEED==1            /* Fout = 202.8MHz */
#define M_MDIV  0xA1
#define M_PDIV  0x3
#define M_SDIV  0x1
#endif
#define USB_CLOCK 1
#if USB_CLOCK==0
#define U_M_MDIV        0xA1
#define U_M_PDIV        0x3
#define U_M_SDIV        0x1
#elif USB_CLOCK==1
#define U_M_MDIV        0x48
#define U_M_PDIV        0x3
#define U_M_SDIV        0x2
#endif

添加:(晶振12M,CPU405M,USB48M)

#define M_MDIV 0x7f
#define M_PDIV 0x2
#define M_SDIV 0x1
#define U_M_MDIV 0x38
#define U_M_PDIV 0x2
#define U_M_SDIV 0x2

修改 board_init 函数中:
gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;
改为:
gd->bd->bi_arch_number = MACH_TYPE_S3C2440;

3.再次编译u-boot,串口有输出


第三步:配置Nand Flash(K9F1G08U0A 128MB 8BIT)

1.删除对Nor Flash支持

(1)修改include/configs/fl2440.h

删除:

#define CONFIG_SYS_FLASH_CFI
#define CONFIG_FLASH_CFI_DRIVER
#define CONFIG_FLASH_CFI_LEGACY
#define CONFIG_SYS_FLASH_LEGACY_512Kx16
#define CONFIG_FLASH_SHOW_PROGRESS      45
#define CONFIG_SYS_MAX_FLASH_BANKS      1
#define CONFIG_SYS_FLASH_BANKS_LIST     { CONFIG_SYS_FLASH_BASE }
#define CONFIG_SYS_MAX_FLASH_SECT       (19)
#define CONFIG_ENV_ADDR                 (CONFIG_SYS_FLASH_BASE + 0x070000)
#define CONFIG_ENV_IS_IN_FLASH

添加:

#define CONFIG_SYS_NO_FLASH 1
#define CONFIG_ENV_IS_NOWHERE   1

(2)修改include/config_cmd_default.h

删除:

#define CONFIG_CMD_IMI
#define CONFIG_CMD_IMLS

(3)修改 board/samsung/fl2440/fl2440.c

修改board_flash_get_legacy函数附近代码:

#if !defined(CONFIG_SYS_NO_FLASH)
ulong board_flash_get_legacy(ulong base, int banknum, flash_info_t *info)
{
        info->portwidth = FLASH_CFI_16BIT;
        info->chipwidth = FLASH_CFI_BY16;
        info->interface = FLASH_CFI_X16;
        return 1;
}
#endif

2.添加Nand Flash支持

(1)修改include/configs/fl2440.h

取消CONFIG_CMD_NAND的注释。

(2)添加Nand驱动文件

拷贝drivers/mtd/nand/s3c2410_nand.c,并更名s3c2440_nand.c,并修改:

删除:

#define S3C2410_NFCONF_EN          (1<<15)
#define S3C2410_NFCONF_512BYTE     (1<<14)
#define S3C2410_NFCONF_4STEP       (1<<13)
#define S3C2410_NFCONF_INITECC     (1<<12)
#define S3C2410_NFCONF_nFCE        (1<<11)
#define S3C2410_NFCONF_TACLS(x)    ((x)<<8)
#define S3C2410_NFCONF_TWRPH0(x)   ((x)<<4)
#define S3C2410_NFCONF_TWRPH1(x)   ((x)<<0)
#define S3C2410_ADDR_NALE 4
#define S3C2410_ADDR_NCLE 8

添加:

#define S3C2440_ADDR_NALE 0xc
#define S3C2440_ADDR_NCLE 0x8

替换所有的2410为2440::g/2410/s//2440/g

修改boart_nand_init函数:

删除:

#else
        tacls = 4;
        twrph0 = 8;
        twrph1 = 8;
#endif
  cfg = S3C2440_NFCONF_EN;
  cfg |= S3C2440_NFCONF_TACLS(tacls - 1);
  cfg |= S3C2440_NFCONF_TWRPH0(twrph0 - 1);
  cfg |= S3C2440_NFCONF_TWRPH1(twrph1 - 1);
writel(cfg, &nand_reg->nfconf);

添加:

#else
/*
HCLK is 100MHZ
FL2440‘NAND FLASH IS K9F1G08U0A
time_acls=tacls*HCLK=10ns
time_we=HCLK*(twrph0+1)=15ns
time_wh=HCLK*(twrph1+1)=10ns
*/
        tacls = 1;//10ns
        twrph0 = 1;//20ns
        twrph1 = 0;
#endif
        u_int32_t cnt;
        cfg =tacls<<12 | twrph0<<8 | twrph1<<4;//for nfconf
        cfg &= ~(1<<0);//bus width:8bit
        writel(cfg, &nand_reg->nfconf);
        cnt = 1<<6|1<<5|1<<0;//for nfcont
        writel(cnt,&nand_reg->nfcont);

修改s3c2440_hwcontrol函数:

struct nand_chip *chip = mtd->priv;  
        struct s3c2440_nand *nand = s3c2440_get_base_nand();  
        debugX(1, "hwcontrol(): 0x%02x 0x%02x\n", cmd, ctrl);  
   //if (ctrl & NAND_CTRL_CHANGE) { 
        ulong IO_ADDR_W = (ulong)nand;  
                if (ctrl & NAND_CLE)  
                        IO_ADDR_W |= S3C2440_ADDR_NCLE;  
                if (ctrl & NAND_ALE)  
                       IO_ADDR_W |= S3C2440_ADDR_NALE;  
                //chip->IO_ADDR_W=(void*)IO_ADDR_W;  
                if(ctrl & NAND_NCE){  
                        writel(readl(&nand->nfcont) & ~(1<<1),&nand->nfcont);  
                 }else{  
                        writel(readl(&nand->nfcont) | (1<<1),&nand->nfcont);  
                 }  
        //}  
        if (cmd != NAND_CMD_NONE)  
                writeb(cmd,(void*)IO_ADDR_W); 

3.重新编译u-boot,有Nand信息输出

第三步:添加网卡支持(DM9000)

1.删除原网卡CS8900支持

修改include/configs/fl2440.h

/*#define CONFIG_CS8900*/               /* we have a CS8900 on-board */  
/*#define CONFIG_CS8900_BASE    0x19000300 */  
/*#define CONFIG_CS8900_BUS16*/ /* the Linux driver does accesses as shorts */  
#define CONFIG_DRIVER_DM9000 1  
#define CONFIG_DM9000_BASE 0x20000300  
#define DM9000_IO CONFIG_DM9000_BASE  
#define DM9000_DATA (CONFIG_DM9000_BASE+4) /* the cmd pin is addr2*/  
#define CONFIG_ETHADDR a8:00:3E:26:0A:5B  
#define CONFIG_NETMASK 255.255.255.0  
#define CONFIG_IPADDR 192.168.1.11  
#define CONFIG_SERVERIP 192.168.1.234  
#define CONFIG_NET_MULTI  
/* 
#define CONFIG_NETMASK          255.255.255.0 
#define CONFIG_IPADDR           10.0.0.110 
#define CONFIG_SERVERIP         10.0.0.1 
*/ 

【注】DM9000接到NGCS4,基址为0x20000000,网卡基址0x20000300。

2.添加DM9000支持

(1)修改board/samsung/fl2440/fl2440.c中的board_eth_init函数

#ifdef CONFIG_CMD_NET  
int board_eth_init(bd_t *bis)  
{  
        return dm9000_initialize(bis);  
}  
#endif 

(2)修改drivers/net/dm9000x.c

删除:

i = 0;  
while (!(dm9000_phy_read(1) & 0x20)) {  /* autonegation complete bit */  
        udelay(1000);  
        i++;  
        if (i == 10000) {  
                printf("could not establish link\n");  
                return 0;  
        }  
}  
/* see what we‘ve got */  
lnk = dm9000_phy_read(17) >> 12;  
printf("operating at ");  
switch (lnk) {  
case 1:  
        printf("10M half duplex ");  
        break;  
case 2:  
        printf("10M full duplex ");  
        break;  
case 4:  
        printf("100M half duplex ");  
        break;  
case 8:  
        printf("100M full duplex ");  
        break;  
default:  
        printf("unknown: %d ", lnk);  
        break;  
}  
printf("mode\n"); 

删除函数 dm9000_halt 中的内容:

static void dm9000_halt(struct eth_device *netdev)  
{  
#if 0  
        DM9000_DBG("%s\n", __func__);  
        /* RESET devie */  
        dm9000_phy_write(0, 0x8000);    /* PHY RESET */  
        DM9000_iow(DM9000_GPR, 0x01);   /* Power-Down PHY */  
        DM9000_iow(DM9000_IMR, 0x80);   /* Disable all interrupt */  
        DM9000_iow(DM9000_RCR, 0x00);   /* Disable RX */  
#endif  

3.重新编译u-boot,可以启动网卡了

FL2440移植u-boot2011.09,布布扣,bubuko.com

FL2440移植u-boot2011.09

原文:http://www.cnblogs.com/lucas-hsueh/p/3709063.html

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